Hi Ryan,
Since we already have you in this thread, might as well ask you here 
That maxscript does look useful and cool, but what I was referring to was using geo decals not only to chip off edges, but for a much wider range of use.
So, my very basic question for you would be - why is deferred decal shader not working with geometry? Is there any specific reason for that (performance??) or it was never considered to be used this way? And maybe you know of some magic line somewhere in configs of in shader source files that can enable this functionality? I would appreciate your help very much, as lack of this feature limits me a lot, as I always have to compromise for some other solutions none of which are ideal.
Thanks!